\muffler.



UNITED STATES Patented May 16, 1905.

PATENT OEEICE.

CHARLES H. BLOMSTROM, OF DETROIT, MICHIGAN. ASSIGNOR TO C. H.

BLOMST OM MOTOR COMPANY, OF DETROIT, MICHIGAN, A CORPORA- TION OF MICHIGAN.

MUFFLER.

SPECIFICATION forming part of Letters Patent No. 790,248, dated May 16, 1905.

Application iled October 8,1904. Serial No. 227,690.

To (t/l 71771/0771/ 'lit muy concern:

Be` it known that I, CHARLES I-I. BLoM- sTRoM, a citizen of the United States, residing at Detroit, county of Elayne, State of 5 h/Iichigan, have invented a certain new and useful Improvement in hf'IuIIlers; and I declare the following to be a full, clear, and exact description of the invention, such as will enable others skilled in the art to which it porio tains to make and use the same, reference being had to the accompanying drawings, which form a part of this specification.

This invention relates to mufflers for eX* plosive-engines.

15 It has for its object an improved mu'll'ler adapted to be connected to the exhaust-pipe of an explosive-engine and to be used to control the exhaust and mulIle or deaden the noise of the vibrations.

In. the drawings, Figure l is a section through the muffler. Fig. 2 is a perspective of the outlet end.

I indicates a pipe adapted to be secured to the exhaust-pipe of the engine. A portion of 2 5 this pipe is provided with holes 2 through the walls. This portion of the pipe and another portion of about equal length are surrounded by a shell 3, which is spaced from the pipe 2 and which with its end closures forms an an- 3o nular chamber around the pipe 2. The chamber is divided into nearly equal parts by a diaphragm 4, which is perforated and through which the products of combustion pass from the part 5 of the chamber into the 3 5 chamber part 6 of the chamber. The terminal of the pipe 1 is inserted into the opening of an elbow-pipe 7, preferably made integral with the end closure 8 of the main chamber, and this is closed by a gate or door l), 4o pivoted to swing over the opening and nor mally held closed by a spring I() and provided with a draft-rod 16. The door is pivoted to a lug I2 on the casing of the elbow 7 and turns on this pivot. When the door is open, there is free escape for the gases of com 45 bustion, which pass through the pipe and the elbow and are not inullled.

Through the end 8 of the chamber 6 are inserted pipes 13 and 14, which extend into the chamber 6 for a distance and are pro- 5o vided with perforations which eoact in the end opening of the pipe as inlet-openings, through which the gases enter from the chamber 6, and after entering the gases pass through and escape from the open ends of 55 the pipes 13, which are preferably turned downward when the mufl'ler is used on motor-vehicles, for which it is mainly intended.

When the device is to be used for muflling purposes, the gate 9 is closed and the 6o products of combustion are then forced to travel through the openings 2 into the chamher 5, thence through the openings 4]. in the diaphragm il, and thence through the openings into the tubes I3 and 14, Afrom the free 65 ends of Which they finally escape.

That I claim is- 1. In a muflier, the combination of an inclosed casing, a pipe running through said casing adapted at one end to receive the eX- 7o haust from an engine, the other end of said pipe opening from said casing, perforations through said pipe into said casing, an outlet from said casing, and a removable closure for the end of said pipe opening from said 75 casing.

2. In a muffler, the combination of an inclosed casing, a pipe running through said casing adapted at one end to receive the exhaust Afrom an engine, the other end of said 8o pipe opening from said casing, a foraminous diaphragm surrounding said pipe and divide ing said casing into two compartments, perforations through said pipe into the compartment nearer the receiving end of said pipe, 8 5 an outlet from the other of said compartments, and a removable closure for the end of said pipe opening from said casing.

3. The combination of an inelosed easing, said pipe, and a removable closure-.for the a pipe running through said easing adapted passage through said elbow. n Io at one end to receive the exhaust from an In testimony whereof I vsign this specificaengine, the other end of said pipe opening tion in the presence of two Witnesses.

5 from said easing, perforations from said pipe v CHARLES H. BLOMSTROM.

into said easing, an outlet from said easing, Witnesses: an elbow at the end of said pipe opening MAY E. KOTT,

from said easing forming a eontlnuation of CHARLES F. BURTON.. 

